Pump



June 24, 1941 H. NEIBERT 2,247,553

PUMP

Filed Jan. 5, 1939 2 Sheets-Sheet 1 INVENTOR HAROLD NEIBERT H. NEIBERTJune 24, W41.

PUMP 1 Filed Jan. 5, 1939 2 Sheets-Sheet 2 INVENTOR HAROLD NEIBERTPatented June 24, 1941 Harold Nether-t, Davenport, Iowa, assignor toMicro-Weston, inn, hettcndori, lowa, a corporaflon oi Delawareapplication rascals, not, Serial no than iii This invention relates toimprovements in pumps of the type havim a rotary impeller withperipheral hucketa which engage the liquid to be pumped in apromo-developing channel.-

- More specifically, it relatm to improvements in pumps of thischaracterwherein the pre minedeveloping channel is formed by apalr ofannular rings, which may he removed and replaced when it is desired toalterthe performance or capacity of the pump, or which may he removedfor any purpose.

After o. period oi operation of these liquid pumps the removable ringsfrequently stick tightly in the housing and it is very dimcult. to edecttheir removah It is, therefore, an object oi this invention to provideliquid pumps wherein the annular rings which cooperatively form thepressure-developing channel may be easily removed from the pump housingafterthe pump has heen in operation tor a considerable period. Otherobjects will heoome apparent from the following detailed description oisuitable embodiments oi the invention i t 1' in connection with theaccompanying drawings. in which Figure l is an end elevation, partly insection,

ot a rotary impeller type pump embodying this a invention;

Fig. '2 is a partial section of the pump on the line 2-2 of Fig. l:

"Fig. 3 is an end elevation of the housing of the pump illustrated inFig. l with thecover plate removed:

' Fig. 4 is an enlarged fragmentary sectional view showing a method forlocking the annular pressure channel defining rings in the housing;

Fig. 5 is an end elevation, partly in section.

of a rotary impeller type pump embodying a modification of my invention:

Fig. 6 is an end elevation, partly in section, oi

one of the annular rings:

Fig. '1 is an end elevation, partly in sectioiuoi another annular ringwhich cooperates with that shown in Fig. 6;

v Fig. 8 is a side elevation oi the ring shown in Fig. 6, looking in thedirection oi the arrows il-dof Fig. 6; v v

- Fig, 9 is a side elevation of the ring shown in Fig. 7,. looking inthe direction of the arrows 9-4 in Fig. 7. Reierring more particularlyto the drawings, in which like parts are identified by like numitsperipheral edge. a set of buckets is shown asiormcd on each side oi therotor or impeller i and separated by a oircumierentially extending webt. The individual buckets in each set are separated from one another bythe radial wehs t.

The impeller is secured on a shaft t and is disposed in the pump chambert, which is iormed hy the pump housing or casing i and a cover it. it isdriven by a motor, not shown, and the shaft is preferably carried injournals eirterna'lly oi the chamber t.

the annular rings ii and it are received in the pump chamber t andcooperatively define a pressure developing channel i i which surroundsthe peripheral edge oi the impeller, so that the buckets move throughthe channel as the inipeller rotates. The channel is substantiallyannular and h provided with an inlet it and an outlet it. -'ifhe inletcommunicates with an intake passage it formed in a boss iii of thehousing i, and the outlet cmunicates with the outlet passage i t in'thehoes it: also in the cas log t and adjacent the hoes iii. Each of thebosses ill and it is suitably threaded to receive the intake anddischarge pipes it and it, respectivelv.

Between the inlet iii and the outlet it the rings t and it closelysurround the impeller edge, so that, during the operation of the pump,liquid flowing through the pressure developing channel is directedthrough the outlet it. This closely fitting part of the rings isreferred to as the stop and is indicated by the numeral it.

Radially inward from the channel it, the rings 9 and it are formed withannular sealing ribs ti and ttfrespectively, which have a running htwith the impeller i and'prevent radial how of the liquid into and out ofthe channel it from the center of the pump chamber t. The rings a and ithave circumferential ribs it and it, respectively, which meet at theparting line as and cooperatively form the pressure developing erals ofreference throughout the several views.

the pump comprises a rotary impeller i, usually of relatively flat,disklike'form, andprovided with a plurality of marginal buckets 2,formed near channel. The ribs 2t and it, of course, do not extend acrossthe inlet it and the outlet it,

thereby permitting the ingress and egress oi the liquid to and from thechannel ii. In the region of the stop 2'0 the portion lit oi the rib 24crtends to a position closely adjacent the periphcry of the impeller iand has a running fit therewith to cooperate with the stop 20 and theportion 21 of the rib 23 in directing liquid through the outlet it. Inthe vicinity of the outlet. i2 and the inlet it, the rings 9 and It makegood contact with the pump'housing i. To insure against leakage theexternal peripheries of the rings 9 and I'll may be coated with paint,or other sealing material, when the pump is being assembled. 7

On account of hardening of the paint, corrosion, etc., these ringsfrequently stick in the pump housing, so that it is very diflicult tore- According to this invention themove them.

rings 9 and I are forced tightly against the region or contact area 28,forming a seal between casing may very tightly adhere, due to hardentheinlet l3 and the outlet l2 from the pump chamber 6. The rings 9 and inare fonced against the contact area 28 by suitable clamping.

means, which may be the set screws 29 and 30;

The region or area 28 may extend beyond the region of the stop, butshould not cover more than one-half of the internal periphery of thehousing 1. The extent of the region or contact area is determined by theextent of the 'relieved portion 32 of the housing 1 and need not extendangularly more than the distance to eflectja accuse ing of the paint orother sealing means originalby applied, as well as the collection ofsediment and corrosioninthis region.

good seal, which generally is a slight distance beyond the inlet andoutlet port areas.

Consequently, when rings 9 and It with circular peripheriesare used thecasing should be relieved around an inner circumference up to the pointwhere it is desired to maintain contact between the rings and easing.

In Figs. 8 and 9 'a'modiflcation of the invention is shown in whichrings 9' and Ill -are formed with relieved portions 34 and 35, andportions 3|, which contact with the inner face 28 01' the casing sectionto form the sealed region or portion.

The rings 9 and Ill preferably carry an aligning means, such as aV-groove 33, adapted to receive the movable clamping means 29 and 38, sothat the inlet 13 and the outlet l2 will always be assembled adjacent'the' inlet and outlet pasvent binding between the impeller l and thehousing 1 when the ring 9 is moved radially away from the contactsurface, the portion 21 of the rib 23 is made so that it cannot come incontact with the impeller upon the slight radial motion. This may beaccomplished by making the portion 21, or, if desired, all of rib 23, sothat it does'not out interierenceoccurring between the impeller and theportion 21. The impeller is next removed and, after loosening theclamping screw 30, the ring lil'may then be removed laterally from thebearing surface and withdrawn from the housing 1. The depth of therelieved-portions of the 110118- ing or rings, as the case may he,should preferably be sufllciently'large to enable sediment or corrosionto be removed from between the annular rings and the housing. However,distances Various modifications oi. the invention, which readily occurfrom a study of the foregoing disclosure and the illustrations in thedrawings, are

contemplated and intended to be included with in the scope of theappended claims.

What I claim is]: 1. In a-rotary pump traits-smears. a as ing, annularrings disposedjn the casing and having portions .whichcooperativelydefine a pressure developingchannel, an impeller having. marginalbucketsmounted for rotationthrough the channel, an inlet and outlet tothe .chan-' nel through the rings and casing, an area of con-. tact forportions of the rings and the casing sur-. rounding the inlet andoutlet, said area'extende.

ing over not more than half the internal. peripher'y'of the casing,means for securely holding the rings and easing together throughout thecontact area, and means for releasing the holding. means.

2. In a rotary lar rings disposed in the casing and having portionswhich cooperatively define a pressure developing channel, an impellerhaving marginal 1 buckets mounted ior rotation through said channel, aninlet and anoutlet for said channel through the rings, and easing. stopmeansdisposed between the inlet and the outlet and close?- is fittingthe impeller to aid in directing liquid through the outlet,vsaid stopmeans including portions which fit closely adjacent the periphery of theimpeller, said portions being carried by the ring which is normally lastremoved on disassembly of the pump to providevfacile removal of saidrings without danger or injuryto the impeller. an area oicontact for therings and the casing surrounding the inlet and the outlet to provideaseal, said area ofcontact extending over not more than half theinternal periphery suns, casing, means for holdingthe rings and thecasing securely together throughout the contact area, and means viorreleasing ,the holding means.

3. In a rotary pump. a casing, removable annular rings disposed in thecasing and having portions which cooperatively deflne a.pressuredeveloping channel, an impellermountedfor r0:- tation through saidchannel, anoutletj iromthe channel through the rings andthefcasing, an

' areaof contact-tor portions oi the, and case mg surrounding the outletto providean efl'ective seal for the outlet, said areaextendingz overless than hall the internal. Periphery of the casing to permit tacileremoval or the rings, means ior securely holding the. rings and sintogether throughout the contact area, and torreleasing-the oiltheturbine type, annu-l

